Abstract:
Catalytic hydrogenation of CO
2 is considered to be one of the most practical ways to produce value-added chemicals and fuels. However, due to the extreme chemical inertness, the high C–C coupling barrier and the many competing reactions, it is of vital important to develop the efficient catalysts for achieving the activation and transformation of CO
2 into a variety of chemical products. In recent years, indium oxide has aroused great interest in CO
2 hydrogenation due to its abundant oxygen vacancies, high selectivity of methanol and high activity of CO
2 conversion. In this paper, the structure of In
2O
3 and the catalytic performance of In
2O
3-supported or metal-doped composite catalysts for CO
2 hydrogenation to methanol are reviewed. The effects of the proximity of In
2O
3 to different zeolites and the migration of elements on the products of CO
2 hydrogenation to hydrocarbons are also discussed. Finally, the challenges and development directions of selective hydrogenation of CO
2 over In
2O
3-based catalysts are summarized.